Product: 2000-2004 GMC Yukon/Yukon XL Stainless Manifold Exhaust Header. Descriptions: Want to give your Yukon/Yukon XL a boost? This exhaust manifold is design to improve both mid range torque and top end horsepower. The 2-piece design header is made out of high quality stainless steel for durability without dragging your car down in weight. This racing inspired exhaust manifold can make your driving experience more exciting by improving torque and horsepower in all rpm range. Professional installation is recommended.